can battery supply a microcontroller ?

[yassin.kraouch]

please who have a idea on how to supply a microcontroller MSP430 from w battery directly, to reduce the use of component ?

 

[andre_luis]

Yassin,

You can supply with low voltage range : 1.8 V to 3.6 V
So, a 3,3v battery can be used.

https://focus.ti.com/lit/ds/symlink/msp430f2131.pdf

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[yassin.kraouch]

thank you andre, but this is not the problem the problem is that i have 40Ah battery used in a car and i would like to supply the microcontroller from the battery, the voltage of the battery is between 1.8 and 3.2V, without using a dc-dc how can i do this ?

 

[andre_luis]

You can use linear regulator, due few amount of current required.
However, you must take a lot of care concerning spike protection ( filtering ), due amount of noise propagated by sparking performed at motor.

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[yassin.kraouch]

i am serching for a solution that i didn't use a regulator, and a low cost solution, with a few component

 

[IanP]

i am searching for a solution that i didn't use a regulator, and a low cost solution, with a few component

Regulators are simple – they are “small” and have only 3 pins – any other solution will be more complex ..
:wink:
IanP